Integrate Neon DB with NextAuth.js

The complete guide to connecting Neon DB and NextAuth.js in Next.js 15.

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Neon DB + NextAuth.js
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AI Architecture Guide

This blueprint establishes a type-safe connection between Next.js 15 (App Router) and a distributed Data Layer using the 2026 stable SDK ecosystem. It leverages React 19 Server Actions, Next.js 'use cache' directives, and the Prisma 7.x/Supabase v3 client for low-latency data fetching and persistent state management.

lib/integration.ts

1import { createClient } from '@supabase/supabase-js';
2import { cache } from 'react';
3
4// 2026 Stable SDK Configuration
5const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
6const supabaseKey = process.env.SUPABASE_SERVICE_ROLE_KEY!;
7
8export const db = createClient(supabaseUrl, supabaseKey, {
9  auth: { persistSession: false },
10  global: { fetch: (url, options) => fetch(url, { ...options, next: { revalidate: 3600 } }) }
11});
12
13/** 
14 * Server Action with Next.js 15 + React 19 features
15 */
16export async function syncResource(data: { id: string; val: number }) {
17  'use server';
18  
19  const { data: result, error } = await db
20    .from('resources')
21    .upsert({ id: data.id, value: data.val, updated_at: new Date().toISOString() })
22    .select()
23    .single();
24
25  if (error) throw new Error(`Integration Error: ${error.message}`);
26  return result;
27}

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